Aseptic syringe.



H. A. JWULPING-LUBR.

ASEPTIG SYRINGB. APPLICATION rmm APR. 19, 1904.

PATENTED 00$. 1 904 N0 MQDEL.

UNITED STATES Patented October 18, 1904.

PATENT OFFICE. I

HERMAN ADOLPHE WULFING-LUER, OF PARIS, FRANCE.

ASEPTIC SYRINGIE.

SPECIFICATION forming part of Letters Patent No. 772,450, dated October18, 1904.

Application filed April 19, 1904.

To all whom it may concern.- 7

Be it known that LHERMAN Anon-Pun WUL- FING-LiIER, of No. 6 RueAntoine-Dubois,

Paris, France, have invented certain. new and usefulImprovementsinAseptic Syringes; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to improvements in syringes made entirely ofcrystalline material, such as glassthat is to say, without any kind ofextra fittings. These syringes consist of the body of the syringe madeof glass smooth on its interior surface and containing a plunger, alsomade of glass'and smooth on its exterior surface. At present thegraduating of such a syringe is done by means of lines traced by acid onthe exterior surface of the body of the syringe, the plunger of such asyringe being entirely free from graduations. In order to sterilize thesyringe before each injection, it is necessary to plunge it into waterand bring this to a boiling-point, the result being that after a fewoperations the graduations become effaced and impossible to read, or atany rate the reading being made very difficult. The improvements I havemade remedy this inconvenience.

The invention consists in principle in providing the plunger of thesyringe with an additional graduation and in limiting the stroke of theplunger by means of a simple arrangement easily fitted onto the body ofthe syringe.

In the accompanying drawings, Figure 1 is an elevation of a syringehaving the graduations applied in the old way. Fig. 2 is a view of theplunger therefor. Fig. 3 is a view of the plunger having the graduationsapplied thereto according to this invention. Fig. 4: is a view of thegraduated plate. Fig. 5 is an elevation of the syringe with the plungertherein. Fig. 6 is alongitudinal section. Fig. 7 is a transverse sectionon lineAB of Fig. 6. Fig. 8 is a longitudinal sectional elevation of thecomplete syringe having attached thereto I a device for limiting thestroke of the plunger.

Fig. 9 is a transverse section through A A, Fig. 8. Fig. 10 is a view inperspective of a collar having a stop thereon. Fig. 11 is a Serial No.203,906. No model.)

the plunger instead of being marked on its.

exterior surface may preferably be situated on the interior surface. Oneof the most practical ways consists in inserting within the hollowbefore heating and sealing the stem to the operatimg-button a or beforethe stem is closed at its front end a small plate f, Fig. 4, made ofaluminium, for example, colored or otherwise and which is clearlygraduated.

The small plate f" is, it must be. understood, fixed in such a way thatthe zero of its graduation will be situated inline with the enlarged endof the body of the syringe a when the plunger is thrust to the bottom ofthe syringe, so that in order to read the volume of liquid admitted,whatever position the plunger may occupy, it will be necessary only toread the graduation-mark which stands opposite the edge of the extremityof the body of the syringe. The small inner plate in all cases makes theextremity of the plunger more clearly visible when the syringe ischarged with liquid. The use of such a plate inserted in the plungerenables the exterior graduations of the body of the syringe and of theplunger itself to be omitted.

Figs. 8 to 12 show more particularly the arrangement which limits the*length of the stroke of a plunger made entirely of glass. In all thesevarious figures, a is the body of the syringe, mad e entirely of glassand smooth on its interior surface. Within the body of this syringe is ahollow glass plunger of two diameters b c. The exterior diameter of thefront part Z) of the plunger fits the interior diameter of the body ofthe syringe. The dibefore it is closed by the glass head (Z a scalemarked on a straight or bent plate 0, made of porcelain, aluminium,celluloid, or any other suitable material. The head 9 of the body of thesyringe is suitably notched for the passage of or for holding inposition the projection 71, carried by an open metallic collar When thiscollar (shown in perspective in Fig. 10) is placed in position on thebody of the syringe, the projection it projects inward in such a waythat its extremity forms an abutment for the projection f. In otherwords, the outward movement of the larger-diameter portion 6 of theplunger will be stopped by the projection it, and thus prevent thesyringe from being filled beyond the maximum of the graduation andespecially prevent a length of stroke of the plunger suflicient to causethe entrance of air.

The head of the body of the syringe may be doubly notched, as is shownin Fig. 11, for the adaptation of two projections formed on a collarsuch as is shown in Fig. 12. It goes without saying that the spurs orprojections on the collar may be more numerous still, it being onlynecessary to make the head of the syringe of suitable shape.

It is suflicient in all cases for this end or head to have one or moreenlarged portions or flanges 1/1 in order to retain the collar 5 inplace.

I clai1n-- 1. A syringe having a hollow plunger and means in theinterior of the plunger carrying grad nations.

2. A syringe having a hollow plunger and a plate in said plunger havinggrad nations thereon.

3. A syringe having a plunger formed with two diameters, the body ofsaid syringe having flanged portions formed on its head, a collar havinga projection thereon, said collar being held on the syringe by saidflanged portion and the said flanged portions having a notch formedtherein in which the n'ojcctioii of the collar fits so as to form a stopfor the large diameter of the plunger.

In testimony whereof I have hereunto set my hand at Paris, this 7th dayof April, 1904, in the presence of two subscribing witnesses.

HERMAN ADOLPHE \VUhl lNG-hllllll.

\Vitnesses:

LOUIS Giumn'r, HANSON C. (Jones.

